package com.itsu.controller;

import com.github.pagehelper.PageInfo;
import com.itsu.domain.Dept;
import com.itsu.domain.Module;
import com.itsu.service.DeptService;
import com.itsu.service.Impl.DeptServiceImpl;
import com.itsu.service.Impl.ModuleServiceImpl;
import com.itsu.service.ModuleService;
import com.itsu.utils.BeanUtil;
import com.itsu.utils.MD5Util;
import com.mysql.cj.util.StringUtils;

import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
import java.util.List;
import java.util.UUID;

@WebServlet("/system/module")
public class ModuleController extends HttpServlet {

    private ModuleService moduleService = new ModuleServiceImpl();
    
    @Override
    protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
        doPost(req, resp);
    }

    @Override
    protected void doPost(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
        String operation = req.getParameter("operation");
        if ("list".equals(operation)){
            showList(req, resp);
        } else if ("toAdd".equals(operation)) {
            toAdd(req, resp);
        } else if ("save".equals(operation)) {
            save(req, resp);
        } else if ("toEdit".equals(operation)) {
            toEdit(req, resp);
        } else if ("edit".equals(operation)) {
            edit(req, resp);
        } else if ("delete".equals(operation)) {
            delete(req, resp);
        }
    }

    private void showList(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
        int pageNum = 1;
        int pageSize = 10;
        if (!StringUtils.isNullOrEmpty(req.getParameter("page"))){
            pageNum = Integer.parseInt(req.getParameter("page"));
        }
        PageInfo<Module> pageInfo = moduleService.findAll(pageNum, pageSize);

        req.setAttribute("page", pageInfo);

        req.getRequestDispatcher("/WEB-INF/pages/system/module/list.jsp").forward(req, resp);
    }

    private void toAdd(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
        List<Module> moduleList = moduleService.findAll();
        req.setAttribute("moduleList", moduleList);

        req.getRequestDispatcher("/WEB-INF/pages/system/module/add.jsp").forward(req, resp);
    }

    private void save(HttpServletRequest req, HttpServletResponse resp) throws IOException {
        Module module = BeanUtil.fillBean(req, Module.class, "yyyy-MM-dd");
        module.setId(UUID.randomUUID().toString());
        moduleService.save(module);
        resp.sendRedirect(req.getContextPath()+"/system/module?operation=list");
    }


    private void toEdit(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
        String id = req.getParameter("id");
        Module module = moduleService.findById(id);
        List<Module> moduleList = moduleService.findAll();
        req.setAttribute("moduleList", moduleList);
        req.setAttribute("module", module);
        req.getRequestDispatcher("/WEB-INF/pages/system/module/update.jsp").forward(req, resp);
    }

    private void edit(HttpServletRequest req, HttpServletResponse resp) throws IOException {
        Module module = BeanUtil.fillBean(req, Module.class, "yyyy-MM-dd");
        moduleService.update(module);

        resp.sendRedirect(req.getContextPath()+"/system/module?operation=list");
    }

    private void delete(HttpServletRequest req, HttpServletResponse resp) throws IOException {
        Module module = BeanUtil.fillBean(req, Module.class,"yyyy-MM-dd");
        moduleService.delete(module);

        resp.sendRedirect(req.getContextPath()+"/system/module?operation=list");
    }
}
